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# Is x > 0 ? (1) x^2>0 (2) x^3>0

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Board of Directors
Joined: 01 Sep 2010
Posts: 3405
Is x > 0 ? (1) x^2>0 (2) x^3>0  [#permalink]

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01 Nov 2018, 05:11
Top Contributor
00:00

Difficulty:

5% (low)

Question Stats:

96% (00:20) correct 4% (00:17) wrong based on 32 sessions

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Is x > 0 ?

(1) $$x^2>0$$
(2) $$x^3>0$$

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Intern
Joined: 02 Feb 2018
Posts: 1
Re: Is x > 0 ? (1) x^2>0 (2) x^3>0  [#permalink]

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01 Nov 2018, 05:42
1
1) x can be either negative or positive . NOT SUFFICIENT

(-1)^2=1 and 1^2=1

2) x must be positive for this to be true. SUFFICIENT

Re: Is x > 0 ? (1) x^2>0 (2) x^3>0   [#permalink] 01 Nov 2018, 05:42
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